International Chemical Safety Cards 2,5-DICHLOROPHENOL ICSC: 0439 1-Hydroxy-2,5-dichlorobenzene C6H4Cl2O Molecular mass: 163 ICSC #    0439 CAS #     583-78-8 RTECS # SK8600000 UN #        2020 November 23, 1998 Peer reviewed TYPES OF HAZARD/ EXPOSURE ACUTE HAZARDS/ SYMPTOMS PREVENTION FIRST AID/ FIRE FIGHTING FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire. NO open flames. Powder, water spray, foam, carbon dioxide. EXPLOSION EXPOSURE STRICT HYGIENE!  •INHALATION Burning sensation. Cough. Sore throat. (Further see Ingestion). Local exhaust or breathing protection. Fresh air, rest. Refer for medical attention.  •SKIN MAY BE ABSORBED! Redness. Pain. Blisters. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.  •EYES Redness. Pain. Face shield, or eye protection in combination with breathing protection. First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.  •INGESTION Abdominal pain. Burning sensation. Diarrhoea. Dizziness. Headache. Laboured breathing. Nausea. Vomiting. Weakness. Do not eat, drink, or smoke during work. Rinse mouth. Rest. Refer for medical attention. SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment. Chemical protection suit including self-contained breathing apparatus. Provision to contain effluent from fire extinguishing. Separated from oxidants, food and feedstuffs. Ventilation along the floor. Do not transport with food and feedstuffs. Marine pollutant. R: S: UN Hazard Class: 6.1 UN Packing Group: III SEE IMPORTANT INFORMATION ON BACK ICSC: 0439 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

International Chemical Safety Cards 2,5-DICHLOROPHENOL ICSC: 0439 I M P O R T A N T D A T A PHYSICAL STATE; APPEARANCE: COLOURLESS CRYSTALS , WITH CHARACTERISTIC ODOUR. PHYSICAL DANGERS: CHEMICAL DANGERS: The substance decomposes on burning producing toxic and corrosive fumes including acid chlorides, acid anhydrides. Reacts with oxidants. OCCUPATIONAL EXPOSURE LIMITS: TLV not established. ROUTES OF EXPOSURE: The substance can be absorbed into the body by inhalation, through the skin and by ingestion. INHALATION RISK: A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C, on dispersing (however) much faster. EFFECTS OF SHORT-TERM EXPOSURE: The substance strongly irritates the eyes, the skin and the respiratory tract. Exposure may result in chloracne. EFFECTS OF LONG-TERM OR REPEATED EXPOSURE: See Notes. PHYSICAL PROPERTIES Boiling point at 99.2kPa: 211°C Melting point: 59°C Solubility in water: poor Vapour pressure, Pa at 25°C: about 17 Relative vapour density (air = 1): 5.6 Relative density of the vapour/air-mixture at 20°C (air = 1): 1 Octanol/water partition coefficient as log Pow: 2.92-3.06 ENVIRONMENTAL DATA The substance is toxic to aquatic organisms. This substance may be hazardous to the environment; special attention should be given to soil. In the food chain important to humans, bioaccumulation takes place, specifically in aquatic organisms. N O T E S Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken. Also consult ICSC 0438 (2,4-Dichlorophenol) and 0440 (3,5-Dichlorophenol). Transport Emergency Card: TEC (R)-804 ADDITIONAL INFORMATION ICSC: 0439 2,5-DICHLOROPHENOL (C) IPCS, CEC, 1994

IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.